Tub



FIG. 1 is a perspective view of a tub design showing our new design;

FIG. 2 is a top view of the tub design.

FIG. 3 is a front view of the tub design.

FIG. 4 is a first side view of the tub design; and,

FIG. 5 is a second side view of the tub design.

The broken lines showing of a tub surround are for illustrative purposes and form no part of the claimed design. 

The ornamental design for a tub, as shown and described. 